MPD78
02-18-2009, 07:15 AM
Hello all,
Would it make sense to have ending converged values differ by approximately 3% between VBA (Visual Basic for Applications) and Fortran 77?
I wrote a program in Access that was originally written in Fortran 77 to calculate a heat balance for a heat exchanger and also to calculate the exit temperature of flow stream being heated and my results between the two programs differ by about 3% but the input data for both versions of the program are the same. The convergence loop is used to calculate the exit temperature of the stream being heated. I am using the same initial guess that was used in Fortran 77. I am perplexed.
Can anyone shed some light on this for me?
Thanks
Matt
Would it make sense to have ending converged values differ by approximately 3% between VBA (Visual Basic for Applications) and Fortran 77?
I wrote a program in Access that was originally written in Fortran 77 to calculate a heat balance for a heat exchanger and also to calculate the exit temperature of flow stream being heated and my results between the two programs differ by about 3% but the input data for both versions of the program are the same. The convergence loop is used to calculate the exit temperature of the stream being heated. I am using the same initial guess that was used in Fortran 77. I am perplexed.
Can anyone shed some light on this for me?
Thanks
Matt